S-91054A270 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Enhanced wear resistance and extended service life due to TiCN coating that reduces friction and prevents galling
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing applications
• Precise alignment and smooth rotation enabled by the 1" shoulder with precise fit tolerances
• Easy installation and removal with 5/32" hex socket drive, providing secure torque transmission
• Wide compatibility with 1/4"-20 UNC coarse threads and Class 2A fit for standard industrial assemblies
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable use

Professional Applications & Engineering Value

This TiCN coated shoulder screw is engineered to address critical alignment and durability challenges in precision machinery. The 18-8 stainless steel base material offers excellent corrosion resistance, while the TiCN coating significantly enhances surface hardness and reduces wear in high-movement applications like rotating shafts, linkages, and pivots. The 1" shoulder length with precise diameter tolerances ensures accurate component spacing and smooth bearing surfaces, minimizing vibration and misalignment. With a 1/4"-20 UNC coarse thread and Class 2A fit, it provides reliable fastening in assemblies requiring repeated adjustments. Ideal for use in automation equipment, conveyor systems, and precision instruments, this screw delivers long-term reliability under demanding operational conditions.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for standard industrial compatibility. The shoulder diameter is 5/16" with a tolerance of -0.002" to 0", and the shoulder length is 1" with a tolerance of 0" to 0.003" for precise assembly. Manufactured from 18-8 stainless steel with a tensile strength of 70,000 psi and Rockwell B55 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence.